Ultimately, I had to roll back my graphics card driver to version 184.108.40.20692, or to use the same naming conventions NVIDIA uses on their site, version 442.92. Since your card is a different one in the GeForce series, that might not end up being the version you need, but I thought I'd include that just in case.
I think when Premiere Pro updates, sometimes it ceases to play well with the graphics card driver. I've had other issues along those lines, and finding just the right version of the drivers has helped. Hope this is helpful to you!